In case anyone wants to know, there are two Moemon I found in the game that aren't in the encounter txt document. They are not legendary Moes. Those are fun to find on your own, lol.
Spoilers if you want to know which ones and where:
In the file you downloaded with the patch, there's an encounter txt document. In the document, all "??? 1%" listings are legendary moemon.
I believe all gen 1-3 are in the game, and some 4-6.